code: def test_season(self):
      with pytest.raises(ValueError):
          metrics.mase(
              self.series3, self.series3 * 1.3, self.series_train, 8
          )
  
imports: import numpy
  import pandas
  import pytest
  from darts import TimeSeries
  from darts.metrics import metrics
label_desc: Use image node_id 10 for calling the TestMetrics obj's underlying member method code with example usage: obj.test_season() without return types